Flying Underground Mushroom Guardian

This creature flys around in the vast majestic caverns, a simple life for something to do, 
BUT, it is not as it seems.

This creature is a guardian for the vast underground mushroom colonies that thrive deep in the caves,
these colonies, may look something like this (just with more blocks)

Defending this underground mushroom biome (who knew?!) from the vast hordes of steves fleeing from the monster infested biomes that may surround it, as its only job, is to protect the mushroom underground with its life if needed.